JP2000234776A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance ventilation performance of a ventilator in which air can be exhausted efficiently from a specified local zone in the form of a swirling air flow. SOLUTION: A ventilator comprises an air supply chamber 3 being introduced with outer air through an air supply duct 6, an exhaust chamber 4 for exhausting air through an exhaust duct 7 disposed on the inside of the air supply chamber 3 concentrically thereto, an air supply space 16 formed between the exhaust chamber 4 and the air supply chamber 3, an exhaust space 17 formed in the exhaust chamber 4, and air supply fan 18 for introducing outer air through the air supply duct 6 and forming a swirling air flow disposed in the air supply space 16, and an exhaust fan 19 for exhausting the inner air sucked through an air inlet 13 to the outside through the exhaust duct 7 disposed in the exhaust space 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for effectively exhausting air in a specific local region to the outside by generating a spiral swirling vortex in a supply direction and an exhaust direction in mutually opposite directions. Related to a ventilated device.

[0002]

2. Description of the Related Art As one method for exhausting a specific local area, for example, a spiral intake vortex in the exhaust direction is related to the relationship between the air blown spirally and the intake negative pressure sucked in the opposite direction. A so-called tornado-type ventilator that generates air is conventionally used.

[0003] For example, Japanese Patent Application Laid-Open No. 4-140
And Japanese Patent Application Laid-Open No. 9-42734.

First, Japanese Patent Application Laid-Open No. 4-140 discloses that
An exhaust hood is provided at an upper part of the exhaust target space, and an exhaust port connected to an exhaust fan of an exhaust duct is formed at a central portion of the exhaust hood, and a lower surface of the exhaust hood has the same circumference as the center of the exhaust port. The air is ejected in the tangential direction to generate a spiral airflow that rises spirally by the ejected air and the suction negative pressure from the exhaust port, and the air in the exhaust target space is exhausted by the spiral airflow. In the exhaust device, a gas supply chamber is fixed to a lower outer peripheral portion of the gas exhaust hood, and a first air for ejecting air to a lower surface of the gas supply chamber in a tangential direction of the same circumference as the center of the gas exhaust port. And a second jet port for jetting air toward the lower floor surface are alternately arranged at regular intervals, and the air from the second jet port is directed toward the floor surface appropriately. Squirting into the above The spiral spiral airflow generated by the blast air from the exhaust port in the tangential direction on the same circumference as the center of the exhaust port and the suction negative pressure from the exhaust port while preventing the spiral spiral air flow from being disturbed. Is configured to efficiently exhaust the space to be exhausted by the spiral airflow.

In Japanese Unexamined Patent Application Publication No. 9-42734, the above-described helical spiral airflow exhaust device is applied to an exhaust device such as smoke of a cooking appliance such as a gas stove to perform effective exhaust. It is configured as follows.

[0006]

However, the above-mentioned conventional examples have the following problems in any case.

(1) Since the swirl vector can be given only in one step at the air outlet, it is difficult to generate an effective swirl airflow.

(2) Since air is supplied and exhausted only by a duct fan in an air supply duct or an exhaust duct, the air supply and exhaust performance is insufficient and an effective swirling airflow cannot always be generated, and ventilation is performed. Inefficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An air supply chamber and an exhaust chamber are provided, and an air supply fan is provided in an air supply space in the air supply chamber. By making it possible to generate a swirling airflow in advance for the airflow supplied to the outlet, and by providing an exhaust fan in the exhaust chamber to increase the suction negative pressure in the exhaust direction It is another object of the present invention to provide a ventilating device that can more effectively generate a blowing swirling airflow and an exhaust swirling airflow, and improve supply / exhaust performance.

[0010]

Means for Solving the Problems In order to achieve the above object, the present invention is provided with the following means for solving the problems.

(1) The ventilation device according to the first aspect of the present invention is provided with an air supply chamber 3 into which outside air is introduced via an air supply duct 6, and is provided concentrically inside the air supply chamber 3. An exhaust chamber 4 for discharging air through an exhaust duct 7, and an air supply space 16 formed between the exhaust chamber 4 and the air supply chamber 3.
And an exhaust space 17 formed in the exhaust chamber 4.
And air blown in the swirling direction through the swirling flow generating stators 12, 12,... Provided at the lower opening side of the air supply space 16 between the air supply chamber 3 and the exhaust chamber 4. An air outlet 11, an air inlet 13 provided at the lower end side opening surface of the exhaust space 17 of the exhaust chamber 4, and sucking air in a predetermined local area into the exhaust chamber 4 in a swirling state; An air supply fan 18 that is provided in the air supply duct 16 and that introduces outside air through the air supply duct 6 and forms a swirling flow, and an internal air that is provided in the exhaust space 17 and that is sucked through the air suction port 13. Fan 19 for discharging air to the outside through the exhaust duct 7
It is comprised including.

Therefore, in this configuration, the air supply fan 18
Is driven, outside air is first introduced from the air supply duct 6 into the air supply chamber 3, and exhausted through the recirculation type air supply space 16 having a long flow path between the air supply chamber 3 and the exhaust chamber 4. A strong swirling vortex that spirals back around the outside of the chamber 4 is formed.

After the strong swirling vortex is further imparted with a vector in a further sufficient swirling direction via the swirling flow generating stators 12, 12,... A more stable swirling vortex at a constant speed and in a fixed direction is blown out smoothly in the turning direction.

Therefore, the air flow blown out from the air outlet 11 is a more effective spiral swirling vortex in which the flow velocity and swirling direction are stable. On the other hand, at the same time, the exhaust fan 19 is driven to draw in the internal air in the specific local area at the center of the swirling vortex from the air intake port 13 and discharge it to the outside via the exhaust duct 7. Therefore, in the direction of the inner air inlet 13 of the swirling vortex in the blowing direction, an upward swirling vortex having sufficient exhaust performance is generated by the high suction negative pressure.

As a result, ventilation performance is improved.

(2) The ventilation device according to the second aspect of the present invention, in the configuration according to the first aspect of the present invention, includes a duct fan 6 for introducing outside air into the air supply duct 6 and a duct fan 6 into the exhaust duct 7. Are provided with duct fans 8 for deriving inside air, respectively.

Therefore, in this configuration, effective ventilation performance is ensured even when the arrangement distance of the supply / exhaust ducts 6 and 7 is long, for example, when the configuration of the first aspect of the present invention is applied to a building. can do.

(3) The ventilating apparatus according to the third aspect of the present invention is the ventilating apparatus according to the first or second aspect, wherein the air supply fan 18 and the exhaust fan 19 are provided.
Are respectively provided with dedicated fan motors M ₁ and M ₂ .

Therefore, the supply fan 18 and the exhaust fan 19 are driven by the dedicated fan motors M ₁ and M ₂ , respectively, with a stable and sufficient driving force.

(4) The ventilating apparatus according to the fourth aspect of the present invention is the ventilating apparatus according to the first or second aspect, wherein the air supply fan 18 and the exhaust fan 19 are provided.
Are configured to have a single common fan motor M.

Therefore, one set of fan motors is sufficient,
Space saving, weight reduction, and cost reduction can be achieved.

[0022]

As described above, according to the ventilating apparatus of the present invention, it is possible to provide a ventilating apparatus with improved air supply / exhaust capability and high ventilation performance.

[0023]

(Embodiment 1) FIGS. 1 and 2
1 shows a configuration of a ventilation device according to Embodiment 1 of the present invention.

As shown in FIG. 1, the ventilation device 1 is provided above a cooking utensil 2 such as a gas table in a general household kitchen or a commercial kitchen.
Is wrapped in a downwardly swirling air curtain flow by the outside air sucked in from outside, and generated from the heating cooking appliance 2 by the swirl flow generated upward in the air curtain flow by the air curtain flow. A first feature is that the inside air containing smoke and the like is efficiently suctioned and discharged outside.

When the supply of air from the outside air and the exhaust of inside air are performed separately and independently as described above, if the amount of supply air introduced from the outside becomes larger than the amount of exhaust air, it is difficult While the room temperature decreases and the heating load of the heating device increases, the cooling load of the cooling device increases in summer and there is a problem that the energy-saving performance is deteriorated. The second characteristic is that the room temperature can be controlled by appropriately adjusting the relationship between the supply air flow and the exhaust air flow discharged to the outside.

In the figure, reference numeral 3 denotes an air supply chamber, for example, having a truncated pyramid shape, provided above the cooking utensil 2. Inside the air supply chamber 3, a top plate 3 a is provided.
A rectangular tubular exhaust chamber 4 is provided between the inner plate 3c and the inner plate 3c inside the outer plate 3b while maintaining a supply space 16 of a predetermined size. As a result, a recirculation type air supply passage having a U-shaped cross section is formed around the outside of the exhaust chamber 4 as described later.

Further, the top plate 3a of the air supply chamber 3
At the center, for example, as shown in FIG. 1, an air supply port 6 a of an air supply duct 6 is connected and opened from the upper side, while an outer peripheral side in the exhaust chamber 4 has an exhaust port 7 of an exhaust duct 7.
a is inserted and opened, the outside air suction ends of the air supply ducts 6,
The inside air discharge ends of the exhaust duct 7 are provided to extend to the outside, respectively. In the middle of each of the supply duct 6 and the exhaust duct 7, a duct fan 8 for supplying air and a duct fan 9 for exhaust, which are composed of, for example, a multi-blade blower (sirocco fan), are provided. Corresponding intake action and exhaust action are each realized efficiently.

Also, the top plate 3a of the air supply chamber 3
The inside air introduction port 21 having the opening / closing amount variable damper 20 is provided on the outer periphery of the connection portion of the air supply duct 6 to control the opening / closing amount of the damper 20 so that the outside air introduced through the air supply duct 6 can be controlled. By mixing a desired amount of inside air, the outside air introduction amount is substantially varied, and the temperature of the airflow blown into the room is appropriately adjusted. The opening / closing amount of the damper 20 is controlled using, for example, a stepping motor or other electrically driven actuator and a microcomputer.

On the other hand, as shown in FIG. 1, a partition (decorative panel) 10 having a predetermined vertical width is provided on the opening between the air supply chamber 3 and the lower end side exhaust chamber 4. An annular air outlet 11 is formed in the lower part of the inner plate 3c near the outer periphery of the air outlet 10 and has a predetermined inclination angle in the outward spreading direction and forms an air blowing passage extending downward.

With the above configuration, inside the air supply chamber 3, a recirculation type having a U-shaped cross section guides the outside air sucked through the air supply duct 6 to the air outlet 11 while swirling. Air supply space 16 with air supply passage structure
Is formed between the top plate 4a of the exhaust chamber 4 and the top plate 3a of the air supply chamber 3 in the air supply space 16 as shown in FIG.
Is provided. The air supply fan 18 sucks the outside air from the air supply duct 6 and the inside air from the inside air inlet 21 with a stronger suction force, mixes them, and makes a strong swirl into the air supply space 16 having the above structure. Form a flow. Reference numeral 18a denotes the blade of the air supply fan 18,
18b is the same hub, M ₁ denotes a fan motor.

The air outlet passage of the air outlet 11 has an appropriate inclination angle with respect to the circumferential surface thereof, and imparts a turning vector to the air flow blown out from the air outlet passage. Are arranged at predetermined intervals in the circumferential direction so as to apply a more effective swirling force to the air flow supplied in the swirling state. In addition, an air suction grille 14 and a filter 15 are sequentially provided from the lower side to the upper side in the air inlet 13 which is an opening surface on the lower end side of the exhaust chamber 4.

[0032] Then, in the exhaust space 17 of the exhaust chamber 4, the exhaust fan 19 is provided consisting of a multiblade blower is driven by the fan motor M ₂ as shown. The exhaust fan 19 has a scroll portion 19b.
The air inlet 19a corresponds to the air inlet 13 and the outlet 19c is connected to the exhaust port 7a in which the exhaust duct 7 is fitted.

Further, the outer plate 3 of the air supply chamber 3
A hood 18 is provided on the outer periphery of the lower end side to restrict the diffusion (spread angle) of the airflow blown out from the air outlet 11. For the same reason, an airflow adhesion preventing guide 10a protruding in the blowing direction is provided on the outer peripheral side of the air outlet 11 so as to protrude by a predetermined dimension.

As described above, in the ventilating apparatus according to this embodiment, the rectangular cylinder is formed by maintaining the air supply space 16 having the U-shaped cross section and the recirculation type air supply passage structure inside the air supply chamber 3 having a truncated pyramid shape. The exhaust chamber 4 is provided with an air inlet 13 at the lower end side opening surface of the exhaust chamber 4, and the air inlet 13 at the lower end side opening surface of the air supply chamber 3 extends from above to below at the outer periphery. Annular air outlets 11 each forming an air outlet passage inclined at a predetermined angle so as to gradually increase the radial position toward the exhaust chamber 4.
And the recirculation type air supply passage structure extending from the air supply port 6a of the air supply duct 6 formed around the outside and the inside air inlet 21 of the outside circumference to the air blowing passage portion of the air outlet 11. An air supply fan 18 is provided in the air supply space 16 and an exhaust fan 19 is provided in an exhaust space 17 of the exhaust chamber 4. The air supply fan 18 allows the air supply fan 18 to pass through the air supply duct fan 9 and the air supply duct 6. While mixing the inside air introduced through the inside air inlet 21 with the outside air introduced from outside through the outside, the mixture is formed into a swirling flow as strong as possible, and then swirling effective for the blown air flow Swirl flow generating stators 12, 12
The air is blown out from the air blow-out port 11 toward the lower floor surface of the room at a predetermined blowing angle. Then, correspondingly, the inside air is sucked from the air suction port 13 by the exhaust fan 19 with a strong suction force.

Therefore, in this configuration, when the air supply fan 18 is driven, the air supply duct 6 and the inside air inlet 2
The outside air and the inside air introduced from 1 into the air supply chamber 3 are mixed via the air supply space 16 which is the above-mentioned recirculation type air supply passage, and the air is efficiently swirled into a stable swirling flow having a uniform flow velocity. The air is supplied to the air outlet 11. Then, when passing through the air outlet passage of the air outlet 11, it has the same swirling direction as that of the supplied swirling flow, has a predetermined swirling angle larger than the swirling angle, and has a predetermined interval in the circumferential direction. The swirling flow generating stators 12, 12,.
, A vector in the turning direction is further increased, and a stronger spiral swirling airflow (see a thick arrow) is blown obliquely toward the periphery of the lower heating cookware 2.

As a result, an air curtain surrounding the exhaust gas such as smoke emitted from the cooking utensil 2 so as not to diffuse into the surroundings is formed by the spiral swirling airflow downward, and its central axial direction. On the inner side, a tornado-shaped swirling intake flow (see a thin-line arrow) having a large suction force rising upward from below is formed by the large suction force of the exhaust fan 9 in the opposite direction.

As a result, it is possible to reliably exhaust and purify contaminated air such as smoke and exhaust gas from the heating cooking utensil 2 portion wrapped by the air curtain formed by the spiral downward swirling airflow. .

As a result, according to the ventilator of the present embodiment, the air supply / exhaust capability is improved, and a sufficiently high ventilator can be provided.

In this case, in the ventilator, the inside air is introduced at the inside air inlet 21 as described above, and the amount of the inside air is appropriately controlled. For example, in both winter and summer, Since the amount of air introduced from the outside can be prevented from exceeding the amount of exhaust air to the outside, the cooling and heating load does not increase.

Further, in the ventilating apparatus, in addition to the built-in air supply / exhaust fans 18 and 19 as described above, the air supply duct 6 is further provided with an air supply duct fan 6 for introducing outside air. The duct 7 is provided with a separate duct fan 8 for exhausting inside air.

Therefore, effective ventilation performance can be ensured even when the arrangement distance of the supply / exhaust ducts 6 and 7 is long, for example, when the ventilation device is applied to a building.

In the ventilation device, the air supply fan 1
The exhaust fan 8 and the exhaust fan 19 are respectively provided with dedicated fan motors M ₁ and M ₂ .

Therefore, the air supply fan 18 and the exhaust fan 19 are driven by the dedicated fan motors M ₁ and M ₂ with a stable and sufficient driving force.

(Embodiment 2) FIG. 3 shows a configuration of a ventilating apparatus according to Embodiment 2 of the present invention.

As shown in FIG. 3, for example, the ventilating apparatus 1 of this embodiment has a configuration in which the driving motor M ₁ for the air supply fan 18 is independently provided in the configuration of the above-described first embodiment.
Exhaust fan drive of the motor M ₂ and shared by a single motor M, is characterized in that it has to be driven in common with.

Therefore, in this configuration, a single set of fan motors is sufficient, and space saving, weight reduction, and cost reduction can be achieved.

(Embodiment 3) FIG. 4 shows a configuration of a ventilating apparatus according to Embodiment 3 of the present invention.

In the ventilating apparatus 1 of this embodiment, as shown in FIG. 4, for example, when the configuration of the first embodiment is employed, the air supply duct fan 9 and the exhaust duct on the air supply duct 6 side are used. The exhaust duct fan 8 on the 7 side is omitted.

For example, when the arrangement distance of the supply / exhaust ducts 6 and 7 is small, such as in a general home or a private store, sufficient supply / exhaust performance is ensured only by the built-in supply / exhaust fans 18 and 19 described above. be able to.

Therefore, in such a case, adopting such a configuration is low-cost and compact.

(Embodiment 4) FIG. 5 shows a configuration of a ventilating apparatus according to Embodiment 4 of the present invention.

In the ventilating apparatus 1 of this embodiment, for example, as shown in FIG. 5, when the configuration of the second embodiment is employed, the air supply duct 6 is provided in the same manner as in the third embodiment.
The air supply duct fan 9 on the side and the exhaust duct fan 8 on the exhaust duct 7 are omitted.

By adopting such a configuration, it is possible to obtain the same operation as that of the third embodiment, and of course, a single fan motor is sufficient as compared with the configuration of the third embodiment. Therefore, it becomes more compact and lower in cost.

[Brief description of the drawings]

FIG. 1 is a sectional view of a ventilation device according to a first embodiment of the present invention.

FIG. 2 is a bottom view of the same device.

FIG. 3 is a sectional view of a ventilation device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a ventilation device according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a ventilation device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 is a ventilation device, 2 is a cooking device, 3 is an air supply chamber, 4 is an exhaust chamber, 6 is an air supply duct, 7 is an exhaust duct, 8 is an exhaust duct fan, 9 is an air supply duct fan, and 10 is an air supply duct fan. A partition wall, 11 is an air outlet, 12 is a swirl generating stator, 13 is an air inlet, 16 is an air supply space having a recirculation type air supply passage structure, 17 is an exhaust space, 18 is an air supply fan, and 19 is an exhaust air. I'm a fan.

Claims (4)

[Claims] An air supply chamber (3) into which outside air is introduced via an air supply duct (6), and a concentrically provided inside the air supply chamber (3), and an air supply duct (7). An exhaust chamber (4) for exhausting air, an air supply space (16) formed between the exhaust chamber (4) and the air supply chamber (3), and an air supply space (16) formed in the exhaust chamber (4). The exhaust space (17), and the lower end side opening surface of the air supply space (16) between the air supply chamber (3) and the exhaust chamber (4). (12) An air outlet (11) for blowing air in the swirling direction through the exhaust chamber (4) is provided at the lower end side opening surface of the exhaust space (17) of the exhaust chamber (4). The air in a predetermined local area is sucked in a swirling vortex inside An air inlet (13), provided in the air supply space (16), and provided in the air supply duct (6);
And an air supply fan (18) that introduces outside air through the air duct and forms a swirling flow, and the inside air that is provided in the exhaust space (17) and that is sucked in through the air suction port (13). 7) A ventilator comprising an exhaust fan (19) exhausting to the outside through (7). 2. The air supply duct (6) is provided with a duct fan (8) for introducing outside air, and the exhaust duct (7) is provided with a duct fan (9) for extracting inside air. The ventilation device according to claim 1, wherein: 3. The air supply fan (18) and the exhaust fan (19) are respectively provided with dedicated fan motors (M ₁ ),
The ventilation device according to claim 1, wherein the ventilation device is configured to have (M ₂ ). 4. The air supply fan (18) and the exhaust fan (19) each having a common single fan motor (M). 2. The ventilation device according to 2.